Bitcoin investors should brace themselves for a “seasonal slog” in September, with the month historically providing the worst average returns, says Bitcoin financial services platform NYDIG. “Unfortunately, potential upcoming near-term catalysts for Bitcoin are sparse at the moment,” wrote NYDIG’s global head of research, Greg Cipolaro, in a Sept. 10 market update. Cipolaro added that Bitcoin investors may only be able to look for a few catalysts external to crypto in the coming weeks, with a tight focus on very specific macroeconomic developments. “Most catalysts have to do with macroeconomic…